A.發(fā)熱值低 B.燃燒速度慢 C.燃燒前進(jìn)行預(yù)熱 D.系統(tǒng)阻力小
A.<30% B.40-70% C.70-80% D.>80%
A.1250℃ B.1320℃ C.1450℃ D.1100℃